Quick-acting vise having rockable lever for sequentially positioning and advancing slidable jaw



1950 B. H. PARKER v 2,530,130

QUICK-ACTING VISE HAVING ROCKABLE LEVER FOR SEQUENTIALLY v POSITIONING AND ADVANCING SLIDABLE JAW Filed Aug. 14, 1947 3 Sheets-Sheet 1 TOR.

1950 B. H. PARKER 2,530,130 QUICK-ACTING VISE HAVING ROCKABLE LEVER FOR SEQUENTIALLY POSITIONING AND ADVANCING SLIDABLE JAW Filed Aug. 14, 1947 s Sheets-Sheet 2 v v I l v INVENTOR. fiuemw/iflae/rfe FM w/iv Nov. 14, 1950 B. H. PARKER 2,530,130

QUICK-ACTING VISE HAVING ROCKABLE LEVER FOR SEQUENTIALLY POSITIONING AND ADVANCING SLIDABLE JAW Filed Aug. 14, 1947 5 Sheets-Sheet 3 I INVENTOR. 42 fiz/era/vh. Pee/(5 BY v 14 7 TOE/VE Y5.

Patented Nov. 14, 1950 UNITED STATES PATENT OFFICE QUICK-ACTING VISE HAVING ROCKABLE LEVER FOR SEQUENTIALLY POSITION- ING AND ADVANCING SLIDABLE JAW Burton H. Parker, Detroit, Mich.

Application August 14, 1947, Serial No. 768,683

This invention relates to vise structures and more particularly to an improved quick action vise.

Anwimportant object of this invention is to provide an improved vise having a slidable movable jaw member which requires only a short operating movement of a single control member for clamping the movable jaw against further movement and for exerting an extremely high gripping pressure upon an object inserted between the jaws of the vise. Another important object of the invention is to provide an improved vise of this character which is quick acting in operation and obtains an extremely high gripping pressure with a minimum of effort. A further important object of this invention is to provide a viseof this character comprising few parts of relativelysimple manufacture which are rugged in construction and are easily assembled for use and easily disassembled for inspection or replace.- ment of parts. A still further object of the invention is to provide a vise of this character having the parts so located with respect to one another and the jaws that a clearance for working operations is provided on all sides of an object gripped by the jaws.

' In carrying out the invention, the vise is composed of two jaw members, one of which is slidably movable toward and away from the other for initially gripping an obj ect therebetween. An important feature of the invention relates to the relation of the fixed and movable jaw members and particularly to the novel sub-division of the movable jaw member into two relatively movable parts flone of which is slidably adjustable to initijallyengage and hold an object between the jaws, and the other part of which is subsequently capableof advancement in parallel relationship toward the fixed jaw to tightly grip an object therebetween. Another important feature of the invention is the provision of a novel lever member and fa control therefor consisting of a single-"rotatable member which when operated in one direction will first securely clamp the slidable jaw structure against further movement and thereafter, advance the object gripping part of the jaw structure into tightly compressed engagement with the object held between the jaws.

Various other objects, advantages and meritorious features of the invention will become more fully apparent from the following specification, appended claims and accompanying drawings wherein:

Fig. 1 is a side elevation of an embodiment of 6 Claims. (Cl. 81-26) tion, and showing the parts thereof in non-clamping position,

Fig. 2 is a side elevation of the vise similar to Fig. 1, partly broken away in section, and illustrating the parts thereof in clamping or gripping position, Y

Fig. 3 isa vertical sectional view of the vise taken along line 33 of Fig. 1,

i Fig. 4 is a side elevation of the vise structure, showing the vise proper turned 90 to its support in over-hanging relation to the side of a bench, Fig. 5 is a top plan view .of the vise structure in smaller scale, illustrating by full and dotted lines the swiveling movement of the vise on its support. j i

Fig. 6 is a detail vertical sectional view taken along line 6+6 of Fig. 1, and

Fig. 7 is a topplan view of the movable jaw member taken along line 1-| of Fig. 1, but omitting a dirt excluding cover pla te.' 7

In the present embodiment of the invention, a bench vise is shown but it is understood that the features of the invention may be incorporated into vises for use on milling machines, drill presses and other types of apparatus.

Referring to Fig. l, the vise is shown mounted on a table top or bench l0, adjacent to one edge thereof; A base plate l2 forming part of the vise structure is secured to the upper surface of the bench by bolts l4 so that one side of the plate projects beyond the edge of the bench as shown in Figs. 1, 2 and l. The base plate I2 may be ofa generally circular formation as shown in Fig.15 but cut away on the projecting side thereof to form notches having abrupt end walls 16 which willserve as stops as will be described more particularly hereinafter.

The projecting sideof the base plate 12 isprovided with a circular aperture l8. Surmounting the base'plate is an upwardly opening channel member 20 having a depending cylindrical projection or bearing 22 which removably fits the aperture [8 and projects therebelow as shown in Figs. 1 and 3. The channel member may be clamped to the base in any suitable manner, such as by the provision of a cup-shaped clamping member 24 enclosing the lower projecting end of the bearing 22 and the further provision of a threaded stud member 26 which is threadedly engaged in a downwardly opening axial bore 28 in the cylindrical bearing 22. The stud member is shouldered at 30 to form a seat for the cupshaped membfer.- A handle 32, which is transversely slidable through the lower end of the stud the present invention, partly broken away in sec- 56 member 26,- will upon rotation in one direction threadedly draw up the stud member and carry the cup-shaped member 24 into clamping engagement with the underside of the plate l2 to securely hold the channel member in adjusted position on the base plate. When the clamping engagement of the cup-shaped member is released, the channel member may be rotated or swiveled on the base plate about the axis of the bearing 22. The full and dotted line positions of the parts in Fig. illustrate this swiveling movement.

The vise proper comprises a normally fixed jaw member 34 and a slidably movable jaw member 36. The jaws are supported in a novel manml by the channel member '23 for both rotation about a vertical axis and pivotal swinging movement about a horizontal axis. The fixed jaw 34 is integrally connected to an elongated solid supporting member or body 38 which extends at right angles to the jaw and is of a size to be removably received within and closely fit the upwardly opening channel of the supporting member 26 as shown in Fig. 3. Both the jaw 34 and its supporting body 38 may be cast in one piece as shown or separately formed and secured together.

The sliding jaw 36 is mounted on the body member 38 for longitudinal translational movement toward and away from the jaw 34. This is I preferably accomplished by shaping correspond- 1 ing longitudinally extending grooves 4640 on the opposite sides of the body 38 and shaping the bottom side Of the jaw 36 so that it slidably engages the upper surface 4| of the body 38 and partially embraces the top of the same. The de- I- pending sides of the movable jaw member 36 are provided with inwardly turned flanges 42-42 which enter the grooves ,40 as shown in Fig. 3 and 'slidably fit the same to prevent lateral movement of the jaw member relatively to the body 38.

As previously mentioned, the elongated body 38 is swingably received within the channel member 28 and may be withdrawn therefrom when desired. Projecting through one side of the channel member 20 is a pivot pin 44 which projects through the supporting member and into the opposite side wall of the channel member. The supporting member is bored transversely to slidably receive this pin. One end of the in 44 is provided with a projecting head 46 through which a transversely slidable handle 48 passes. The opposite end of the pin is threaded into the 0pposite side wall of the channel member 20 for detachable securement thereto. When mounted in place, the pin 44 serves as a horizontal pivotal axis about which the supporting member 38 may swing as shown by a comparison of Figs. land l. The pivot pin 44 may be withdrawn to allow the body 38 and associated parts to be removed as a unit from the base support.

Normally when the jaw members .34 and 36 are in the upright conventional position shown in Fig. 1 the supporting body 33 is locked in position in the channel member 29. This is preferabl accomplished by providing a headed pin 58 shown in Fig. 3 having a reduced externally threaded shank 52 which is adapted to be threadedly engaged in a transverse bore formed in the body 38. The pin projects through one side of the channel member 20 and'is provided with a transversely slidable handle 54 for exerting a turning force on the pin. The side wall of the channel member 20 is provided with an upwardly opening slot 56 through which the shank of the pin extends, which is slightly curved as shown in Fig. 1 about the axis of the pivot pin 44. It is obvious that when the pin 50 is rotated in the direction for threaded advancement into the body 38, the shoulder formed by the head of the pin will engage the side wall of the channel member and frictionally lock the body 38 against pivotal swinging movement. However, when the pin 50 is backed off sufficiently to release the frictional compression, the body 38 may be swung about the pivot pin 44 carrying the clamping pin '50 therewith upwardly through the slot 5'6.

As a result of the structure thus far described it is possible to swivel the channel member 20 about the vertical axis of the bearing 22 to various positions such as those illustrated in Fig. 5. It is also possible to swing the two jaw members and their support 38 about a horizontal axis formed by the pivot pin 44 from the conventional position shown in Fig. l to a position therefrom shown in Fig. 4. This last position will dispose the jaws 34 and 36 in superimposed position which is highly convenient for certain operations performed on objects gripped between the jaw members. To accomplish this pivotal swinging movement the channel member '20 and the-two jaw members 34 and 36 are rotated about the axis of the bearing 22 approximately from the position shown in Fig. 1 so that the after end of the supporting body 38 projects from the bench. Thereafter, upon releasing the clamping pressure of the pin 50, the body 38 and the two jaws may be swung in a vertical plane to the position shown in Fig. 4. This will dispose the jaw 34 above the jaw 36 and by virtue of the fact that there are no protruding parts on the jaw 34 it is possible for the operator to clearly see the work being performed on an article gripped between the jaws. In the vertical position of the parts shown in Fig. 4, the body 38 extends closely by the notched edge of the base plate l2 and is swingable about the vertical axis formed by the bearing 22. The bearing axis is eccentrically disposed with respect to the center of the base 'plate and located relatively close to the notched edge thereof. When the body 38 is swivelled about the bearing *axis it enters the notches and its extent of swivelling movement in either direction is limited by engagement with the abrupt end walls |6-IB of the notches.

The two jaw members 34 and 36 are preferably provided with removable gripping face plates whichengage and grip the work. A face plate 58 having a serrated working surface is shown mounted on the fixed jaw 34. A face plate 60 is shown mounted .on the movable jaw member 38 in opposed relation to the face plate 58.. The face plate 60 is directly connected by screws 62 to a longitudinal movable part or member 64 of the structure of the jaw member 36.

The jaw member 36 is actually composed of two parts, the larger part 36 which is slidably movable on the body 38 and a smaller part 64 which is slidably movable on the upper end of the main .part. Referring to Fig. 3, the upper end of the jaw member 36 is reduced in width to provide slide 66 which is under-cut on the opposite sides thereof as indicated at 6868 to provide two parallel extending grooves. The smaller part64 of the jaw member is shaped to embrace the slide 66 and is provided with inturned flanges Mk-1B which enter the grooves 6868 to form a slidingfit. Thus mounted, the part 64 is capable of longitudinal movement parallel to the movement of themain part 36 toward and away from the, opposing faceplate 58 of the fixed jaw.

The forward end of the movable'part 64 of the jaw structure is widened so as to project beyond the opposite sides of the largerpart 36 of the jaw structure as shown in Figs. 4 and 7 and shaped so that the projecting sides of the part depend in overlapping relation. to the sides of the main part. The projecting'side portions of the part 64 beyond the sides of the jaw member 36 are each provided with an inclined face I2 as best shown in Figs. 2 and 4. The slide 66 of the jaw member 36 is provided with a rearwardly opening longitudinal slot I4 in which is received a coiled springIG. As shown in Fig. 1',- the forward end of the slot terminates in a circular recess forming a seat .for the forward end of the spring. The rearv end of the spring is seated upon;a removablestop member H in the form of a vertical set-screw. The latter is threaded in a vertical hole opening out through the top and bottom .of the rear end section of the part 64 and asis evident from Fig. l is retractible therefrom.. In the position of the parts in Fig. 1 the coiled spring is under'compression and-exerts force against thestep I'I urging the part 64 rearwardly of the main, body portion 36; The

upper surface of the jaw 36 may be protected by a removable cover plate 18 which is secured by the screw member I9. The cover plate overlies object interposed between the face plates 58 and 60. The novel means accomplishing this action comprises -a rack in the form of an elongated toothed plate 80 mounted in the upper surface ,of the body 38 and secured thereto by screw members 82 at spaced intervals therealong. The

; teeth of the rack incline forwardly as shown in Figs. 1 and 2. The rack plate 80 has a transverse dimensionlessthan the upper surface M of the body 38 as shown in Fig. ,3 and is mounted centrally thereon. The bottom side of the jaw member 36 is shaped with a, longitudinalg'roove 84 which accommodates the rack plateandhas sufficient clearance thereabove so as to allow the jaw 36 to slide freelythereover.

Mounted on the jaw member 36 is a novel lever member 86 which is forked or bifurcated ,at its forward end to embrace the upper portion of the jaw 36 and also-the movable section 64 .thereof as shown in Fig. 3. These forwardly projecting side portions of the lever member86 form- ;ing the bifurcation are indicated atv 88--,88. They are cut away adjacent to the inclined edges 12' on opposite sides of the part 64 to prevent engagement therewith. Extending transversely through the upper portion of the body 36 is a pivot pin, 90 .which projects beyond the outer-sides thereof and enters the side sections 88- 88 of the lever member, pivotally securing the same to the jaw body and serving as a fulcrum therefor, The

pin 90 is preferably fixed to the lever member against rotation relative thereto by the provision of a screw member 92 (shown in Fig. 4) which projects through one of the side sections 88 thereof and bears against a flattened portion of the pivot pin. Extending through the rearward portion :of the lever member86 at an inclination thereto is an externally threaded control mem- 'ber 94'. The lever member is provided with an inclined internally threaded 'bore'for receiving this member 94', as shown in Fig. 1. The control member 94 is provided with a head portion 96 on the outer endthereof, through which a handle 98 transversely extends. The handle is slidably movable through the head 96 but is frictionally held in any adjusted position. by the provision of the coil spring I00 mounted in the member 94 in the manner shown in Fig. 1.

Immediately below the rearwardly projecting portion of the lever member 86 is a transversely extending bar I02 which is mounted for vertical movement. This bar is provided on the bottom face thereof with rearwardly inclined teeth I03 which are adapted to engage the teeth of the rack plate 80. The bar I02 has a lateral dimension greater than the rack plate and the op-' posite ends thereof are mounted upon vertically extending stud members I04. The latter project downwardly into the widened base portion of the jaw 36 as shown in Fig. 2 and slidably fit vertical holes formed therein for this purpose. Encircling each stud I04 is a coil spring I06 which is seated at its lower end upon the widened base portion of the jaw 36 and at its upper end upon the bar I 02. These springs yieldingly urge the bar I02 upwardly in a direction to disengage the teeth I03 thereof from the rack plate 80.. It is evident that upon threaded advancement of the control member 34 it will engage and depress the. bar I02 into engagement with the rack plate 80.

Preferably from the point of view of economy of manufacture it is desirable to form the control member 94 of relatively soft inexpensive metal and provide on the lower end thereof a hardened metal contact with the bar I02. This is preferably accomplished by forming a circular recess I08 in the bottom end of the control member 94 and mounting therein a hardened steel ball I00 which projects from the lower end of the control member. This ball is preferably locked in position by means of a washer II2 which encircles the lower end of the control member and which,

when'forced into position, inwardly turns the jects beyond the threaded portion of the control member 94 for abutment with the underside of the lever member 86 to serve as a stop limiting the withdrawal movement of the control member. The bar I02 is preferably provided on its outer surface with an insert or. button II 4 of hardened steel material which is disposed in position for engagement by the ball I I0 of the control member. It is evident that upon rotation of the handle 98 in the direction to move the control member 94 downwardly the ball IIO will engage the button H4 and by this medium depress the rack bar I02 into engagement with the rack plate 80.

The upper end portions of the side sections 8888 of the lever member 86 are shaped to extend past the rear sides of the projecting portion of the part 64 of the movable jaw structure. These sections of the lever member are shaped in a novel manner for urging the part 64 forwardly relative to the main body portion 36 of the jaw structure. This is preferably accomplished by the provision of two correspondingly shaped pins I-I6-II6 which are disposed betweenthe laterally projecting forward portion of the part 64 and theupper end of the side sections 88--88 Of the lever member. The pins are receivjed'in recesses formed inthese; members-Zasshown in n ssoaeo :Fig'i2 in order to retain the .pins in position at times.

. of Jeachxpin is received in a'recess H8 formed in Referring to Fig.2 the forward end the'projecting side portion'of the part 64 with which it isassociated. The .rear end of eachpin iIIB'isreceiVed in'a recess 420 in the'upperend of the side section '88 .of the lever member with advance the control member 94 downwardly the .ball J will engage the button I I4 of the rack bar and depress the latter into engagement with the rack'plate. 'This will lock themain :part 36 of the movable jaw structure against further transl-ationalmovementnn the body 38. Upon further .rotation of the handle 98 in the same direction :the levermernber'willtravel up the threads of the control member and will rock ina counterclockwise direction about the axis of the pivot pin 90 .andassume for its ,final position that shown in Fig. 2. During this rocking movement. of the lever member :86 the side sections 8888 thereof will force the pins I l6.I I6 forwardly and thereby-advance-the .part 640i the jaw structure toward the faceplate 58 of the fixed jaw 34.

This movement of the jaw part 64 will compressthe spring I15. When the handle 08 of the control member \94 is rotated in the opposite direction to withdraw the same, the lever member 85 will travel down the threads of the control member and rock in a clockwise direction thereby enabling the compression spring I6 to move the jaw 64 rearwardly. This will separate the face plates 58 and 60 and enable the object gripped therebetween to be removed. Upon further turning of the handle 98 in a withdrawing direction the pressure on the rack bar I02 will be relieved thereby enabling the coil springs I06 to raise the rack bar out of engagement with the teeth of therac'k plate 88. The parts will then assume the position shown in Fig.1 thereby enabling the movable jaw structure to move back and forth on the body 38.

An adjustable stop is provided on the lever member 86 which limits its clockwisemovement.

This step is in the form of a vertical bolt I 22 located in the tail portion of the lever member 86 as shown in Fig. '1 and arranged to depend below the same for engagement with the rearwardly projecting portion of the jaw 36. The

'bolt is .adjustably secured in the lever member by a nut I24 threaded to the lower projecting end thereof. Upon adjustment of the nut it is possible to regulate the distance the bolt I22 projects below the lever member. Upon engagement of the bolt with the jaw 36, further retractable movement of the control member will fail to effect tfurther swinging movement of the lever member 86 but thereafter it will itself be raised relative to the lever member and the body 38 enabling the rack bar I02 to release its clutching engagement with the rack plate.

To protect the rear end section of the elongated supporting body 38, and particularly the rack plate 80 thereof, a removable cover member -I25'is provided. The cover member is of channel formation and of a size to embrace the upper portion of the rear end section of the body '38. .To removably secure the cover memberin place on .the body, the cover is provided with two or :more spaced apart recesses I26 on each side is provided on that end in the form of the transversely extending plate I30 secured thereto by screws I32. The stop plate extends latterly across the open ends of the guiding grooves 40 and forms an abutment thereat against which the body 136 will strike. The stop plate is detachable to allow removal of the jaw structure 3.6 and associated parts from the elongated body 38.

It 'is preferred to make the teeth of the :rack :plate 80 and the rack bar I02 relatively fine and closely related. Atoothspacing of of an inch is desirable on bothof these elements.

As :a result-of'the operating connections formed "by the pins I I6, the rocking moton of the lever member 86 is converted into a straight line motion advancing the jaw member 64 and its associated face plate .50 in continuous parallel relation .to the fixed jaw 34 and its face plate 58. Preferably the clamping plates are formed of tool .steeL. ntall times the gripping surfaces of the face plates .58 and are maintained inparallel relation to one another. If the pins II6 were omitted and the lever member 86 allowed to directly engage the jaw part 64, a wiping or .camming action would occur which would cause the engaging surfaces to wear and affect the rapidity of the operation. The location of the pivoting axis of the lever member adjacent to the pins I16 and thereby spaced from the control member 94 as shown in Fig. 2, serves to multiply the force exerted by the control member. The yielding force exerted by the coiled spring "16 urges the jaw member 64 rearwardly .at all times and continuously maintains the pins H6 is contact with the closed ends of the recesses I I8 and I20 in which they are mounted. Theresistance of the spring I6 is greater than the resistance of the two springs I06 tending to lift .the rack bar I02. As a result, the down- Wardly threaded advancement of the control member will first depress the rack bar into engagement with the rack plate and thereafter upon further rotation in the same direction, cause the lever member to travel up the threads of 'the control member and rock in the direction to thrust the jaw 64 toward the fixed jaw 34.

The bifurcated end sections 88 of the lever member apply an equal pressure on the opposite side portions of the removable jaw 64. The application of equal pressures on the opposite ends rather than on the middle portion of the jaw part 64, assures an equal distribution of gripping pressure by the face plate 60 regardless-of any irregularity in the form of the object disposed between the jaws. Otherwise, if pressure were exerted at the middle portion of jaw part 64, it would tend to twist latterly as it worked on'an irregular object, and possibly bind in the guiding grooves of the slide 66. It is to be noted that the face plate 60 overlies the front --end of the slide 66 and serves as -a stop limiting rearward traveling of the jaw member 64 in the direction urged by :the spring 16.

The upward rearward inclination of the control member 94 and the bore of the lever member in which it is received predisposes the handle 98 further to the rear of-the face than if the control member extended vertically or directly up and down. This removes the handle away from the working area of the jaws allowing the operator more freedom to performhis work. The slidable mounting of the handle 98 in the head 96 of the control member enables the handle to be shifted either one way or the other way to remove it further from the work and gated supporting body 38, and thereafter toforce the movable jaw part '64 forward-ly'under great pressure toward the fixed jaw. After the jaw body 36 has been manually adjusted to a position where the'clamping plates 48 and 60 lightly grip and hold an object therebetween, usually it is only necessary to'rotate the handle one and one-half times to both look the two bodies 36 and 38 together and to clamp the object under extremely high pressure- At the most, three turns of the handle will be required to perform this dual operation. The vise illustrated herein has approximately one-third more capacity than conventional vises of the same size.

While I have illustrated and described the im provements of the present invention in a preferred form of a vise, it will be understood that various changes and modifications therein may be made by those skilled in the art without departing from the spirit and scope of my invention. For example, while I have shown a vise adapted to be used on a bench it will be evident that my improvements may equally advantageously be incorporated into a vise for use on drill presses, milling machines, and other types of apparatus. It will therefore be understood that the claims appended hereto are intended to cover all changes and modifications which fully come within the true spirit and scope ofmy invention.

What I claim is:

1. In a vise, a normally stationary body having a fixed jaw, a second body slidably mounted on the first body for translational movement toward and away from the fixed jaw and capable of being locked in adjusted position, a movable jaw mounted on said second body in opposed relationship to the fixed jaw and for straight line movement relative to the second body toward and away from the fixed jaw, a lever pivotally connected to said second body for swinging movement about an axis extending transversely to the respective paths of movement of the second body and the movable jaw and provided with a part disposed on the side of said movable jaw opposite to the fixed jaw, and an element interposed between the movable jaw and said part of the lever and bearing thereagainst so that the element is capable of rocking movement relative to the movable jaw and said part of the lever as it converts the angular movement of the lever to the straight line motion of the movable jaw.

2. In a vise, a normally stationary elongated body having a fixed jaw at one end thereof, a second body mounted on the first body for slidable movement toward and away from the fixed jaw and capable of being locked in adjusted position, a movable jaw opposing the fixed jaw and mounted on said second body for straight line motion relative thereto toward and away from the fixed jaw, a lever pivotally connected to said second body about an axis extending transversely-to the respective paths of movement of the second body and the movable jaw and having a part disposed on the side of said movable jaw opposite to the fixed jaw, and a pin having one end pivotally engaging said part and the opposite end pivotally engaging said movable jaw and operatively coupling the part to the jaw for moving the latter toward the fixed jaw when the lever is swung in one direction, said pin converting the angular motion of the lever to the straight line motion of the movable jaw and rocking on its ends while accomplishing such action.

3. In a vise, a normally stationary elongated body having a fixed jaw at one end, a second body slidably mounted on the first body for movement toward and away from the fixed jaw, means for locking the second body to the first body against movement away from the fixed jaw, a movable jaw opposing the fixed jaw and mounted on the second body for straight line motion toward and away from the fixed jaw, a lever having one section thereof bifurcated so as to straddle the second body, means pivotally mounting the lever on the second body for swinging movement about an axis extending transversely to the paths of movement of the second body and the movable jaw in such a manner as to dispose the bifurcated section of the lever immediately adjacent to the movable jaw and on the side thereof opposite to the fixed jaw, and a pin interposed between each side of the bifurcated section of the lever and the movable jaw and transmitting the force exerted by the swinging movement of the lever in one direction to the movable jaw to advance the same toward the fixed jaw, spring means yieldin'gly resisting said advancing movement of the movable jaw toward the fixed jaw, each of said pins having its respectiveends pivotally bearing on the movable jaw and on the bifurcated section of the lever and rocking on said bearing points as they convert the angular motion of the lever to the straight line motion of the movable jaw.

4. A vise comprising, in combination, an elongated body supporting an upright fixed jaw member adjacent to one end thereof, a second body slidably mounted on said first body for longitudinal movement toward and away from the fixed jaw member, a movable jaw member slidably mounted onsaid second body for longitudinal movement toward and away from the fixed jaw member; a lever pivotally connected to said second body for'swinging movement about an axis extending transversely to said first body, and upon swinging movement in one direction, operatively engaging said second jaw member and advancing the same relative to the second body and toward said fixed jaw member; an elongated rack plate carried by said first body, a rack bar carried by said second body and mounted for movement relatively thereto into and out of engagement with the teeth of said rack plate respectively to lock or unlock the second body against slidable movement, said lever having an internally threaded bore opening out on opposite sides thereof; and a control member extending through said bore of the lever and being externally threaded for threaded engagement with the bore, said control member, upon threaded advancement in one direction moving 11' said rack bar into engagement with the teeth of the rack plate and thereafter, upon further threaded advancement, swinging the. lever in the direction to advance the. secondjaw mem ber toward the fixed jaw member.

5. A vise comprising, incombination, an. elon- V gated body supporting an upright fixed jaw member adjacent to one end thereof, a second body slidably mounted on said first body for longitudinal movement toward and away from the fixed jaw member, a movable jaw member slidably mounted on said second body for longitudinal movement toward and away from the fixed jaw member; a lever pivotally connected tosaid second body for swinging movement about an axis extending transversely to said first body, and upon swinging movement in one direction operatively engaging said second jaw member and advancing the same relative to the second body and toward said fixed jaw member; an elongated rack plate carried by said first body, a rack bar carried by said second body and mounted for movement relatively thereto into and out of engagement with the teeth of said rack plate respectively to lock and unlockthe second body against slidable movement, said lever having an internally threaded bore extending therethrough from one side to the other side thereof; a control member of greater length than said bore extending therethrough and projecting from the opposite ends thereof, saidcontrol member being externally threaded for threaded engagement with the threads of said bore and having a handle on one'projecting' endthereof for turning the. same and having means on the other projecting end for engaging said:

rack bar, and said handle, upon rotationinone direction threadedly advancing the control mem-- her in said bore and causing the opposite end of. the control member to move the rack bar into clutching engagement with the teeth of the-rackplate and thereafter, upon further rotation in the same direction, causing the lever to threadedly advance relative to the control member andthereby to swing in the direction to advancethesecond jaw member toward said fixed jaw member.

6. In a vise, a normally horizontally extending elongated body, an upright jaw member fixed to the forward end of said body and having the-object gripping surface thereof facing rearwardly' thereof, a second body, means slidably mounting said second body on the elongated body for uninterrupted slidable movement longitudinally therealong. a second jaw member, means slidably mounting said second j-awmember on said second body forlongitudinal movement parallel ingthe: path of theslidable movement of the secondbody and. having its object gripping sur face facing forwardly in opposed relation to the corresponding gripping surface. of saidfixed jaw member,v a lever having one end section thereof. bifurcated: so as.- to. straddle the second body,

means pivotally connecting the lever to thesec-' cndbody for swinging. movement about a trans versely extending horizontal axis. in'sucha man.- ner to dispose the bifurcated end sectionthereof immediately adjacent to said second; jaw member, means operatively' coupling the'bifurcated end section of therlevertothesecond jaw member so thatluponrocking, movementiof' the former in onedireetiondt will movethesec 0nd jaw member-forwardly towardthe fixed jawmember, an elongatedrack plate fixed to theupper surfaceof said elongated body and extending longitudinallythereof, a-rack barcarried by I said second body and depressibly engageable, with. the. rack plate to lock the second body-Q against slidable movement, said lever having an:

upwardly rearwardly inclined internally threaded.

boreopening out through the top and bottom sides thereof,,a controlmember of greater lengththan-saidbore. extending therethroughand projecting from the'opposite ends thereof, said control member. being externally threaded for "threaded. engagement. with said bore. and pro-- vided with a handle on the upper end thereof and a. rounded surface on the lower end of said control. member engageable. with said rack bar.

BURTON H. PARKER.

REFERENCES. CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

